package com.ricky.serviceuser.api;

import com.alibaba.fastjson.JSONObject;
import com.ricky.common_util.helper.JwtHelper;
import com.ricky.common_util.result.Result;
import com.ricky.hosp.model.user.UserInfo;
import com.ricky.serviceuser.service.UserInfoService;
import com.ricky.serviceuser.utils.ConstantWxPropertiesUtils;
import com.ricky.serviceuser.utils.HttpClientUtils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

@Api(tags = "微信用户登录接口")
@Controller
@RequestMapping("/api/ucenter/wx")
public class WxApiController {

    @Autowired
    private UserInfoService userInfoService;
    // 生成微信扫描二维码
    // 返回生成二维码需要的参数
    @ApiOperation(value = "获取登录参数")
    @ResponseBody
    @GetMapping("getLoginParam")
    public Result genQrConnect() throws UnsupportedEncodingException {
        HashMap<String, Object> map = new HashMap<>();
        map.put("appid", ConstantWxPropertiesUtils.WX_OPEN_APP_ID);
        map.put("scope","snsapi_login");
        String wxOpenRedirectUrl = ConstantWxPropertiesUtils.WX_OPEN_REDIRECT_URL;
        wxOpenRedirectUrl  = URLEncoder.encode(wxOpenRedirectUrl, "utf-8");
        map.put("redirect_uri",wxOpenRedirectUrl);
        map.put("state", System.currentTimeMillis()+"");
        return Result.ok(map);
    }
    // 回调的方法，得到扫描人信息
    @ApiOperation(value = "微信扫描后回调的方法")
    @GetMapping("callback")
    public String callback(String code, String state){
        // 获取临时票据 code

        // 使用code以及微信id和密钥，请求微信固定地址，得到两个值
        //使用code和appid以及appscrect换取access_token
        StringBuffer baseAccessTokenUrl = new StringBuffer()
                .append("https://api.weixin.qq.com/sns/oauth2/access_token")
                .append("?appid=%s")
                .append("&secret=%s")
                .append("&code=%s")
                .append("&grant_type=authorization_code");

        String accessTokenUrl = String.format(baseAccessTokenUrl.toString(),
                ConstantWxPropertiesUtils.WX_OPEN_APP_ID,
                ConstantWxPropertiesUtils.WX_OPEN_APP_SECRET,
                code);
        // 使用httpClient请求该地址
        try {
            String accessTokenInfo = HttpClientUtils.get(accessTokenUrl);
            System.out.println(accessTokenInfo);
            // 从返回的字符串中获取两个值openid 和 access_token
            JSONObject jsonObject = JSONObject.parseObject(accessTokenInfo);
            String access_token = jsonObject.getString("access_token");
            String openid = jsonObject.getString("openid");
            // 判断数据库中是否存在该openid(扫码人的信息)
            UserInfo userInfo = userInfoService.selectWxInfoOpenId(openid);
            if (userInfo == null) {
                // 使用access_token 和 openid请求微信固定地址，得到扫描人的信息
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                String userInfoUrl = String.format(baseUserInfoUrl, access_token, openid);
                String resultInfo = HttpClientUtils.get(userInfoUrl);
                JSONObject resultUserInfoJson = JSONObject.parseObject(resultInfo);
                // 解析用户信息，昵称+头像
                String nickname = resultUserInfoJson.getString("nickname");
                String headimgurl = resultUserInfoJson.getString("headimgurl");

                // 将获取到的扫码人信息添加到数据库中
                userInfo = new UserInfo();
                userInfo.setNickName(nickname);
                userInfo.setOpenid(openid);
                userInfo.setStatus(1);
                userInfoService.save(userInfo);
            }

            // 返回name和token的字符串
            Map<String, Object> map = new HashMap<>();
            String name = userInfo.getName();
            if(StringUtils.isEmpty(name)) {
                name = userInfo.getNickName();
            }
            if(StringUtils.isEmpty(name)) {
                name = userInfo.getPhone();
            }
            map.put("name", name);

            //判断userInfo是否有手机号，如果手机号为空，返回openid
            //若手机号不为空，返回openid是空字符串
            //前端判断：如果openid不为空，绑定手机号，如果openid为空则无需绑定
            if(StringUtils.isEmpty(userInfo.getPhone())) {
                map.put("openid", userInfo.getOpenid());
            } else {
                map.put("openid", "");
            }
            // 使用jwt生成token
            String token = JwtHelper.createToken(userInfo.getId(), name);
            map.put("token", token);
            return "redirect:" + ConstantWxPropertiesUtils.APPLICATION_BASE_URL + "/weixin/callback?token="+map.get("token")+"&openid="+map.get("openid")+"&name="+URLEncoder.encode((String)map.get("name"),"utf-8");


        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

    }
}
